Letter from F.H. Dupré, Dr. A. Dupré & Sons, Analytical & Consulting Chemists, 2 Edinburgh Mansions, Howick Place, Westminster, London, S.W.1., to The Secretary, Royal Society, Burlington House Informs that they are disposing of a number of volumes of the Transactions and Proceedings of the Royal Society dated between 1875 and 1907 and that a dealer has undervalued them. Wishes to establish their true value. 24 October 1919